package cn.zyjblogs.sms.configuration;

import com.alibaba.ttl.threadpool.TtlExecutors;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.io.Closeable;
import java.io.IOException;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * Copyright (C), 2021, 北京同创永益科技发展有限公司
 *
 * @author zhuyijun
 * @version 3.0.0
 * @description 线程池
 * @date 2022/5/18 15:38
 */
@Configuration
@Slf4j
@RefreshScope
public class ExecutorConfig implements Closeable {

    @Value("${async.executor.thread.core_pool_size:5}")
    private int corePoolSize;
    @Value("${async.executor.thread.max_pool_size:20}")
    private int maxPoolSize;
    @Value("${async.executor.thread.queue_capacity:50}")
    private int queueCapacity;
    @Value("${async.executor.thread.name.prefix:async-sms-service-}")
    private String namePrefix;

    @Bean(name = "asyncServiceExecutor")
    public Executor asyncServiceExecutor() {
        log.info("[asyncServiceExecutor] init start  .....");
        this.maxPoolSize = Math.max(Runtime.getRuntime().availableProcessors() * 2, maxPoolSize);
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //配置核心线程数
        executor.setCorePoolSize(corePoolSize);
        //配置最大线程数
        executor.setMaxPoolSize(maxPoolSize);
        //配置队列大小
        executor.setQueueCapacity(queueCapacity);
        //配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix(namePrefix);
        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.setBeanName("asyncServiceExecutor");
        //执行初始化
        executor.initialize();
        log.info("[asyncServiceExecutor] Min: " + corePoolSize + " Max: " + maxPoolSize + " core , capacity:" + queueCapacity);
        log.info("[asyncServiceExecutor] init end");
        return TtlExecutors.getTtlExecutor(executor);
    }

    @Override
    public void close() throws IOException {
        log.info("asyncServiceExecutor closing ....");
        log.info("asyncServiceExecutor close");
    }
}